Hybrid-parallel sparse matrix-vector multiplication with explicit communication overlap on current multicore-based systems.

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Hager G, Wellein G, Schubert G, Fehske H
Zeitschrift: Parallel Processing Letters
Verlag: World Scientific Publishing Co
Jahr der Veröffentlichung: 2011
Band: 21
Heftnummer: 3
Seitenbereich: 339-358
ISSN: 0129-6264


Abstract


We evaluate optimized parallel sparse matrix-vector operations for several representative application areas on widespread multicore-based cluster configurations. First the single-socket baseline performance is analyzed and modeled with respect to basic architectural properties of standard multicore chips. Beyond the single node, the performance of parallel sparse matrix-vector operations is often limited by communication overhead. Starting from the observation that nonblocking MPI is not able to hide communication cost using standard MPI implementations, we demonstrate that explicit overlap of communication and computation can be achieved by using a dedicated communication thread, which may run on a virtual core. Moreover we identify performance benefits of hybrid MPI/OpenMP programming due to improved load balancing even without explicit communication overlap. We compare performance results for pure MPI, the widely used "vector-like" hybrid programming strategies, and explicit overlap on a modern multicore-based cluster and a Cray XE6 system. © 2011 World Scientific Publishing Company.



FAU-Autoren / FAU-Herausgeber

Hager, Georg Dr.
Regionales Rechenzentrum Erlangen (RRZE)
Wellein, Gerhard Prof. Dr.
Professur für Höchstleistungsrechnen


Autor(en) der externen Einrichtung(en)
Universität Greifswald


Zitierweisen

APA:
Hager, G., Wellein, G., Schubert, G., & Fehske, H. (2011). Hybrid-parallel sparse matrix-vector multiplication with explicit communication overlap on current multicore-based systems. Parallel Processing Letters, 21(3), 339-358. https://dx.doi.org/10.1142/S0129626411000254

MLA:
Hager, Georg, et al. "Hybrid-parallel sparse matrix-vector multiplication with explicit communication overlap on current multicore-based systems." Parallel Processing Letters 21.3 (2011): 339-358.

BibTeX: 

Zuletzt aktualisiert 2018-09-08 um 16:08